JPH0141911Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a strainer built into a fuel tank located in the middle of a passageway that conveys fuel from a fuel tank to a carburetor by gravity in general motorcycles. Regarding.

(Prior Art) A conventional strainer will be explained with reference to FIGS. 5 and 6.

Conventionally, in fuel tanks used in motorcycles and the like, a filter screen is provided in the fuel passage for the purpose of removing debris floating in the fuel, and the filter screen is similar to the filter screen 34 in FIG. flat like, 6th
It is used in a cylindrical shape like the mesh 33 shown in the figure.

(Problems to be Solved by the Invention) The conventional technology having the above configuration has a problem in that when using a flat mesh 34 as shown in FIG. If a cylindrical filter screen 33 as shown in Fig. 6 is used, a large excess area can be obtained, but the fuel head is low and the oil film spread on the screen 33 is insufficient. If the pressure is not strong enough to break through the air and allow the air to pass through, the air mixed with the previous fuel will accumulate in the space 32 between the inner wall of the cup 9 and the mesh 33 and cover the mesh 33, causing the fuel to leak. This poses problems such as air lock, where the water stops flowing.

(Means for Solving the Problems) The present invention was devised to solve the above problems, and uses a bottomless cylindrical strainer in a strainer installed in a cup attached to the bottom of the fuel tank body. A fitting member 37 that includes a fitting hole 26 that can be fitted into the fuel passage of the fuel pot main body is fixed to the upper part of the net 11, and the lower end 12 of the fitting hole 26 is made into a tapered shape that widens downward.
A ring-shaped flange 27 is fixed to the lower outer periphery of the mesh 1, and a cylindrical member 8 is positioned around the mesh 11 with a gap between the mesh 11 and the flange. 27, and a collar 24 is provided at the upper end of the cylindrical member 8 in the centrifugal direction.

(Function) In the present invention having the above-mentioned configuration, the flange portion 24 of the cylindrical member 8 is held between the fuel pot main body and the cup to support the mesh 11, and the fitting member 37 is fitted. Fuel flows into the interior 20 surrounded by the mesh 11 from the fuel passage that fits into the matching hole 26, passes through the mesh 11, and enters the interior divided by the mesh 11, the flange 27, and the cylindrical member 8. When air is sucked together with the fuel, the air mixed with the previous fuel comes into contact with the mesh 11 only in the interior surrounded by the mesh 11, and this interior 2
0, it floats along the lower end 12 of the tapered fitting hole 26 located above 0 and escapes to the fuel passage side without being retained.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

1 is the main body of the fuel pot, and 17 is a fuel inlet formed in the main body. A valve 2 is inserted into the recess 36 of the main body 1 and opens and closes the fuel passages 18 and 19.

The strainer 7 has a fuel passage 1 of the main body 1 in the upper part.
The fitting member 37 includes a fitting hole 26 that can be fitted with one end of the fitting member 37, and the middle portion of the fitting member 37 is a large diameter portion 28, and from the edge of the large diameter portion 28, a fitting member 37 is provided. While the four legs 29 hang down, the lower end 12 of the fitting hole 26 is tapered to expand downward, and in addition, the bottomless cylindrical mesh 11 is connected to the large diameter portion 28.
The four legs 29 are fixed so as to cover their outer sides, and a cylindrical member 8 is positioned around the four legs 29 with a gap between them and the mesh 11, and the lower end of the cylindrical member 8
It is fixed to the outer periphery of a ring-shaped flange 27 fixed to the outer side of the lower end of the book leg 29 via the mesh 11,
Further, a collar portion 24 is formed at the upper end of the cylindrical member 8 in the centrifugal direction.

Fitting member 3 of strainer 7 having the above configuration
7 is fitted into one end of the fuel passage 19 of the main body 1, and the cup 9 is screwed onto the main body 1 via the elastic material 13, so that the collar portion 24 of the cylindrical member 8 of the strainer 7 is made of an elastic material. The mesh 11 is sandwiched between the main body 1 and the cup 9 via the mesh 13, so that the mesh 11 is firmly supported and kept airtight.

In one embodiment having the above configuration, fuel flows through the fuel passages 18 and 19 into the inside 20 of the filter screen 11 of the strainer 7 and further into the cup 9, and after passing through the filter screen 11, the fuel flows into the gap 21.
The fuel is guided to the fuel outlet 22 through the fuel. That is, in the cup 9, the mesh 11, the flange 27,
Gap 21 which is the interior partitioned by the cylindrical member 8
The space becomes the post-temporal chamber, and the other space becomes the pre-proximal chamber. At this time, when the air in the fuel tank is sucked into the front chamber in the cup 9, the air floats up and reaches the interior 20 surrounded by the mesh 11.
The tapered fitting hole 26 located above this interior 20 further floats along the lower end 12 and the fuel passage 1
It will be returned to the fuel tank via steps 9 and 18. Further, even if it is assumed that the air has reached the exhaust chamber, the air will float upwards and be guided through the fuel outlet 22 to the carburetor. In other words,
In the front and rear chambers, there is no place for air to accumulate in the portions that come into contact with the screen 11.

(Effects) As described above, in the present invention, by using the mesh 11 having a cylindrical shape, the oversurface area can be increased and the throughput capacity can be improved. By providing 8, the cylindrical member 8
Not only is the brim 24 held between the fuel cup body and the cup to support the mesh 11, but also the air mixed with the fuel in the tank comes into contact with the mesh 11 only in the interior 20 surrounded by the mesh 11. Moreover, since the lower end 12 of the fitting hole 26 of the fitting member 37 located above the interior 20 is tapered, the air can flow along the lower end 12 of the fitting hole 26 without staying inside the mesh 11 20. It floats up and escapes to the fuel passage side,
Moreover, since there is nothing blocking the air mixed with the fuel after reaching the gap 21, it floats up as it is and escapes upward.
There is no place for air to accumulate in the area in contact with the mesh 11, so there is no need to worry about an air lock where the accumulated air covers the mesh 11 and prevents fuel from flowing. It is a great contribution to the

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a longitudinal cross-sectional view of Figure 1, Figure 3 is a front view of a fitting member according to an embodiment of the present invention with a mesh and a flange fixed to it, and Figure 4 is a cylindrical shape of the three members in Figure 3. 5 and 6 are partial sectional views showing an example of a conventional strainer having a mesh. FIGS. 1... Main body, 2... Valve, 7... Strainer, 8... Cylindrical member, 9... Cup, 11, 3
0, 34... mesh, 12... lower end, 13... elastic material, 17... fuel inlet, 18, 19... fuel passage, 20... interior, 21... gap, 22... fuel outlet , 24...Brim portion, 26...Fitting hole, 2
7...flange, 28...large diameter section, 29...leg,
32... Space, 36... Recess, 37... Fitting member.

Claims (1)

[Claim for Utility Model Registration] In a strainer installed in a cup attached to the lower part of the fuel pot body, there is a fitting hole in the upper part of the bottomless cylindrical mesh 11 that can fit into the fuel passage of the fuel pot body. 26 is fixed, and the lower end 12 of the fitting hole 26 is made into a tapered shape that spreads downward, and a ring-shaped flange 27 is fixed to the lower outer periphery of the mesh 11. A cylindrical member 8 is positioned with a gap between the screen 11 and the cylindrical member 8. The lower end of the cylindrical member 8 is fixed to the flange 27, and the upper end of the cylindrical member 8 is provided with a collar 24 in the centrifugal direction. A fuel strainer characterized by: